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When someone smells their significant other all over to see if they've been cheating (coming home with another man's cologne or woman's perfume on them). Can also mean when your dog senses you've been around other dogs- they will give you a "sniff down" when you come home.
Heidi gave Steven a sniff down when he got back from the bar last night.
by Jillina March 26, 2013
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